I found a small brown egg. I figure it has to be either a guinea or a Turkey egg. I put it under a poor hen who is broody and still sitting on her nest even though she lost all of her eggs. It can't be a chicken egg.
No guinies, but we found a speckled, small (peewee even) egg in the middle of the yard. Both our turkeys quite laying a couple weeks ago so I'm inclined to believe it's one of them. Candled it and didn't see a yolk.